Advertisements
Advertisements
प्रश्न
Give a chemical test to distinguish between the following gases.
H2 and O2
Advertisements
उत्तर
| Hydrogen | Oxygen |
| Apply a burning splint to the gas: Pure hydrogen burns with a pale blue Flame when a burning splint is brought near it. | Apply a burning splint to the gas: It rekindles a glowing wooden splinter. |
APPEARS IN
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
pressure.
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
Give an example of the following chemical change.
A reaction where colour change is noticed
When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical change involved in the two cases.
NPK are the primary nutrients for plants.
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
The changes in which new substance with new chemical properties are formed are ______.
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi solid.
- It changes colour.
- It changes taste.
- The change cannot be reversed.
Choose the correct option from below:
What are the chemical reactions that occur in everyday life?
